When the code execution, which two events occur as a result of the Apex transaction?

Refer to the following code snippet for an environment has more than 200 Accounts belonging to the Technology’ industry:

When the code execution, which two events occur as a result of the Apex transaction? Choose 2 answers
A . If executed in an asynchronous context, the apex transaction is likely to fall by exceeding the DML governor limit
B . The Apex transaction succeeds regardless of any uncaught exception and all processed accounts are updated.
C . The Apex transaction fails with the following message. "SObject row was retrieved via SOQL without querying the requested field Account.Is.Tech__c”.
D . If executed In a synchronous context, the apex transaction is likely to fall by exceeding the DHL governor limit.

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Answer: C